D. montana
D. montana may refer to:
- Deconica montana, mountain moss psilocybe, a mushroom
 - Deudorix montana, a butterfly in the family Lycaenidae
 - Downingia montana, the Sierra calicoflower, a flowering plant species native to California
 - Drepanosticta montana, a damselfly in the family Platystictidae
 - Drosophila montana, a fruit fly in the family Drosophilidae